318 to 440 Swap

Ok so I'm new to all this am trying to learn. But I've found a 440 that came out of an automatic 1971 satellite for $600. It has around 70,000 miles on it and he said it ran good with no smoking or anything to be concerned about. Now I have a 74 Dodge Dart Sport with a 318 3 speed in it right now. (Its burning some oil too) My question is; How hard is it going to be to drop a 440 into my car? Can I drop it right in or what is it going to take for me to put it in place of the 318? What are some of the problems will i run into doing the swap and what should I look for when looking over the motor? ANY Help would be great!